Template.hello.onCreated(function helloOnCreated() {
    // counter starts at 0
    this.counter = new ReactiveVar(0);
});
Template.hello.helpers({
    counter() {
        return Template.instance().counter.get();
    },
});
Template.hello.events({
    'click button' (event, instance) {
       	Meteor.logout();
        // increment the counter when button is clicked
        // instance.counter.set(instance.counter.get() + 1);
    },
});